Bobbin carrier for braiding machines



July 21, 1959 A. G. HERZOG BQBB IN CARRIER FOR BRAIDING MACHINES ZSheets-Sheei 1 Filed Nov. 25, 1957 .uwiagg INVENTOR. Awasr 645F206 July 21, 1959 A. G. HERZOG 2,895,371

BOBBIN CARRIER FOR BRAIDING MACHINES Filed Nov. 25, 1957 2 Sheets-Sheet? Fig. 4

INVENTOR. AUGUST GONTHER HERZVOG United States Patent BOBBIN CARRIER FOR BRAIDINGMACHIN'ES August Guenther Herzog, Oldenburg-Ofenerdiek, Germany Application November 25, 1957, Serial No. 698,751

Claims priority, application Germany December 6, 1956 6 Claims. (Cl. 87-56) The present invention relates to bobbin carriers, and particularly to those made of synthetic material used in connection with braiding machines. These braiding machines usually contain a certain number of gear wheels which may vary as the case may be, which simultaneously include driving disks by means of which the bobbin carriers are moved along curved tracks provided in such machines.

Bobbin carriers have been known in the prior art in which the springs required for operation thereof are arranged in tubes usually made of suitable metal that are soldered in place and in which the yarn compensator lever and also other component parts have already been made of synthetic materials. Moreover, bobbin carriers generally include a locking device that prevents the spool from arbitrarily turning or running oif. Such locking devices are usually operated in the prior art by tension springs, compression springs and the like.

According to the present invention, the base of the bobbin carrier is constructed entirely of synthetic material such as polyamide, and the guide tubes made of metal for the tensioning spring and the locking spring are cast or molded into it. As a result of such a construction, the springs used in the operation of the bobbin carrier are completely enclosed. Such a construction has the advantage that the spring guide tubes are not required to be soldered in place inasmuch as these tubes are cast or molded integrally with the synthetic base.

In order to release the spool locking device, that is, as soon as a certain amount of yarn has been used or braided into the fabric, a yarn compensator lever i provided in the bobbin carrier arrangement that keegs the yarn under continuous and gentle tension.

In the present invention the spool release is operated by the action of the so-called yarn compensator lever, that is, by lugs attached to each of the two arms thereof. This yarn compensator lever, which is also made of synthetic material in the present invention, is of a U-shaped construction somewhat similar to those in use today in connection with bobbin carriers of known construction. In the prior art arrangements, however, these compensator levers are acted upon by compression springs, tension springs and the like, or by a weight arranged on a pendulum lever.

In the present invention, on the other hand, the yarn compensator is acted on by an easily exchangeable tensioning spring that is entirely enclosed in a tube which, at the same time, provides the mounting means for the spool.

Advantageously, the yarn guide rail in accordance with the present invention is soldered to the spool mounting tube after it has first been attached to the synthetic base as, for instance, by riveting.

The two arms of the U-shaped compensator lever in accordance with the present invention are provided with slots that are in engagement with a transversely arranged tensioning pin provided in a tensioning bolt and acted on by the tensioning spring in the tensioning tube.

The locking bolt, which is guided in the locking tube, includes a transversely arranged pin that extends beyond the bobbin carrier base on both sides thereof through slots provided in the tube and base and is engaged by the above-described lugs on both arms of the compensator lever for effecting the spool release. This doubleside spring action on the compensator lever has a marked advantage over the usual one-sided operation of the compensator lever found in the prior art.

Accordingly, it is an object of the present invention to provide a bobbin carrier for braiding machines, the main body of which is made of synthetic material.

It is another object of the present invention to provide a bobbin carrier for braiding machines in which the associate springs are guided in tubes embedded or molded integral with the synthetic main body or base.

Still another object of the present invention resides therein that integral casting of the spring guide tubes with the main body of the bobbin carrier avoids soldering of the guide tubes.

A further object of the present invention resides therein that the yarn guide rail is attached. to the spring guide tube by soldering and additionally attached to the main body of the bobbin by riveting or the like.

A still further object of the present invention resides therein that spring presure is transmitted to both arms of the U-shaped yarn compensator lever.

Another object of the present invention is to provide a bobbin carrier for braiding machines which is reliable in operation, easy and cheap to manufacture in large quantities, inasmuch as all parts thereof are molded into a common base of synthetic material such as polyamide which retains its shape and which can be cast at low cost with close tolerances. a

These and further objects, features, and advantages of the present invention will become more obvious from the following description of a bobbin carrier for braiding machines in accordance with the present invention when taken in connection with the accompanying drawing which shows, for purposes of illustration only, one preferred embodiment of the present invention and wherein:

Figure 1 is a longitudinal cross-sectional view through a bobbin carrier in accordance with the present invention;

Figure 2 is a front elevational view of Figure 1, partly in cross section along the line 11-11 of Figure 1;

Figure 3 is a side elevational view of the bobbin carrier as viewed in the direction of arrow A of Figure 2; an

Figure 4 shows a view of the bobbin carrier similar to Figure 3 illustrating the relationship between the tension device and the thread.

Referring now more particularly to the drawing, wherein like reference numerals are used throughout the various views to designate like parts, the bobbin carrier in accordance with the present invention comprises a tube section 1 and a tube section 4 made of suitable metal and disposed substantially parallel to each other, both being cast or molded into or made integral with a bobbin carrier base or pedestal 6 of synthetic material such as polyamide. In this manner of construction, soldering of the tube sections to the base is not required.

One end of the tube 1 protrudes out of the synthetic base 6 and, in the usual manner, carries the spool of yarn. A tensioning bolt 3 is slidably arranged within the tube 1 and is being acted on by a spring 2 also enclosed within the tube 1.

Within the second tube 4 a spool locking bolt 4a is slidably arranged and acted on by a second spring 5.

A shaft 7 is rotatably arranged in the base or pedestal 6, having its ends protruding on both sides thereof for 2,895,371 i r e e r hingedly supporting a yarn compensator lever 8. This yarn compensator lever 8 is U-shaped and each of the two arms thereof is provided with a slot 9 through which a transverse pin 10, supported in the tensio ning bolt 3, extends through slotsprovided in tube 1 and base 6. By wayof this transverse pin 10, the yarn compensator lever 8 is pressed downwardly whereby a certain predetermined tension on the yarn is maintained at all times.

The locking bolt 4a is provided with a transverse pin 11 which alsoextends through slots provided in tube 4 and base 6 beyond both sides thereof. A lip or nose 12 is provided on each arm of the yarn compensator lever 8 which engages with the protruding endsof the transverse pin 11 whereby the. locking bolt 4a is depressed, and as a resultthereof, the spool is allowed to rotate freely. By this double-sided construction, the action of the yarn compensator lever 8 is positively transmitted to the locking bolt 4a.

The yarn guide rail 13 which is usually made of metal in a known manner, may be attached to the tube 1 by soldering. Furthermore, the yarn guide rail can be additionally attached to the base by a rivet 14 of the like.

The mounting flange for the bobbin carrier (not shown) can be constructed so as to fit the operating plate of a particular braiding machine.

While I have shown one preferred embodiment of my invention, it is understood that the same is not limited thereto, but is susceptible of many changes and modifications within the scope of a person skilled in the art, such as making and casting the tube 1 and/or tube 4 as part of or integrally with the base 6 and of the same synthetic material, and I, therefore, intend to cover all such changes and modifications as encompassed by the appended claims.

I claim:

1. A bobbin for braiding machines comprising a base of synthetic material and at least two tube sections or" metal arranged side by side and adapted to house operating elements of said bobbin carrier, said tube sections being molded into the synthetic material forming said base.

2. A bobbin carrier according to claim 1, wherein one of said tube sections is extended so as to protrude out of said base to provide a mounting means for the bobbin, a yarn guide rail secured to said one tube section and additionally fastened to said base.

3. A bobbin carrier according. to claim 1, wherein said synthetic material consists of polyamide or the like.

4. A bobbin carrier for braiding machines comprising a base made of synthetic material and at least two tube sections molded into the synthetic material forming said base, one of said tubes sections being extended past said base to provide a mounting means for a bobbin, a tensioning bolt slidably arranged in said tube section, a tensioning spring acting thereon, a tensioning pin attached to said tensioning bolt and extending transversely thereto, a U-shaped compensator lever pivotally mounted on said base and provided with slots in each arm thereof, said tensioning pin being in engagement with said slots whereby said compensator lever is pivotally urged to one side at all times.

5. A bobbin carrier for braiding machines according to claim 4, further comprising a locking bolt slidably arranged in the other one of said tube sections, a locking spring acting thereon, a locking pin attached to said locking bolt extending transversely thereto, said compensator lever being provided with a lug on each arm thereof for engagement with said locking, pin to enable said locking bolt to be depressed for releasing the tension on said bobbin.

6. A bobbin carrier'according to claim 4, wherein said tube sections are molded as part of said base of synthetic material such as polyamide.

Petersen Jan. 7, 1913; Cook Mar. 17, 1936' 

